[vsnet-grb-info 28580] GRB 210822B: Fermi GBM Final Real-time Localization

[GCN Circulars]

TITLE:   GCN CIRCULAR
NUMBER:  30683
SUBJECT: GRB 210822B: Fermi GBM Final Real-time Localization
DATE:    21/08/22 17:40:48 GMT
FROM:    Fermi GBM Team at MSFC/Fermi-GBM  <do_not_reply at GIOC.nsstc.nasa.gov>

The Fermi GBM team reports the detection of a likely SHORT GRB

At 17:30:24 UT on 22 Aug 2021, the Fermi Gamma-ray Burst Monitor (GBM) triggered and located GRB 210822B (trigger 651346229.489012 / 210822729).

The on-ground calculated location, using the Fermi GBM trigger data, is RA = 238.2, Dec = 18.0 (J2000 degrees, equivalent to J2000 15h 52m, 18d 00'), with a statistical uncertainty of 4.8 degrees.

The angle from the Fermi LAT boresight is 74.0 degrees.

The skymap can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210822729/quicklook/glg_skymap_all_bn210822729.png

The HEALPix FITS file, including the estimated localization systematic, can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210822729/quicklook/glg_healpix_all_bn210822729.fit

The GBM light curve can be found here:
https://heasarc.gsfc.nasa.gov/FTP/fermi/data/gbm/triggers/2021/bn210822729/quicklook/glg_lc_medres34_bn210822729.gif